Aerator



FIG. 1 is a perspective view of an aerator showing my new design;

FIG. 2 is a right side elevation view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a front elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in the drawings depict portions of the aerator that form no part of the claimed design. 

CLAIM The ornamental design for an aerator, as shown and described. 